What is the meaning of big points?

Hewitt: “It was a tough match. I probably played the bigger points a little bit better at times. He played extremely well for not having played a lot of matches lately. He is a class player and knows how to play the big points well.”

Got this from atptennis webbie recently,what do they mean by big points?
Can someone explain this to me?

I thnk 15-30 &amp; 30-15 are HUGE. I play them like someone is there and will shoot me in the head if I lose that point. It sets up double game point for whoever is up and it is a common circumstance, less common than being down 0-30 on your serve.

Very true Shaolin. Those I find are the biggest determinants in the outcome of games. Those points are huge. As well as break points for me. The deuce point is also very huge in a game but you are right as the 15-30/30-15 points to be the biggest.

As you can see, people here have stated what the big points are. Basically, they are just the most important points. What usually separates the top players from the run-of-the-mill players is the top players play the big points better, while the rest is fairly equal.